Robert Downey Jr: 'I like to work'

The 46-year-old revealed that he was happy to reunite with co-star Jude Law for the follow-up to 2009's Sherlock Holmes, Sherlock Holmes: A Game of Shadows.

"Well, ever since Mr Law and I met, the chuckles, and the fun, and the happiness come," Downey Jr told Collider. "But we are really quite about the business very much, I believe, as Holmes and Watson are."

He continued: "So... it's 99% perspiration. Oh, you are going to love this - we like getting sweaty together. I mean, we like working our asses off. We like to work."

Sherlock Holmes: A Game of Shadows will see Downey Jr reprise his role as the titular detective, with Law playing his trusty sidekick Dr Watson.